Fair Value Disclosures (Details) - USD ($) $ in Thousands		Jun. 30, 2017		Dec. 31, 2016
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		$ 8,027	[1]	$ 8,393	[2]
Prepaid Expenses and Other Current Assets [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Deferred compensation plan assets		1,200		900
Other Non-Current Assets [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Deferred compensation plan assets	[1]	6,800		7,500
Bond Mutual Fund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		1,484		1,925
Large Cap Mutual Fund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		2,808		2,630
International Mutual Fund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		1,055		1,034
Mid Cap Mutual Cap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		1,009		1,013
Small Cap Mutual Funds [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		711		655
REIT Fund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		228		252
Money Market Funds [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		732		884
Level 1 [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		8,027	[1]	8,393	[2]
Level 1 [Member] | Bond Mutual Fund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		1,484		1,925
Level 1 [Member] | Large Cap Mutual Fund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		2,808		2,630
Level 1 [Member] | International Mutual Fund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		1,055		1,034
Level 1 [Member] | Mid Cap Mutual Cap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		1,009		1,013
Level 1 [Member] | Small Cap Mutual Funds [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		711		655
Level 1 [Member] | REIT Fund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		228		252
Level 1 [Member] | Money Market Funds [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		732		884
Level 2 [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		0	[1]	0	[2]
Level 2 [Member] | Bond Mutual Fund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		0		0
Level 2 [Member] | Large Cap Mutual Fund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		0		0
Level 2 [Member] | International Mutual Fund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		0		0
Level 2 [Member] | Mid Cap Mutual Cap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		0		0
Level 2 [Member] | Small Cap Mutual Funds [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		0		0
Level 2 [Member] | REIT Fund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		0		0
Level 2 [Member] | Money Market Funds [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		0		0
Level 3 [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		0	[1]	0	[2]
Level 3 [Member] | Bond Mutual Fund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		0		0
Level 3 [Member] | Large Cap Mutual Fund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		0		0
Level 3 [Member] | International Mutual Fund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		0		0
Level 3 [Member] | Mid Cap Mutual Cap [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		0		0
Level 3 [Member] | Small Cap Mutual Funds [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		0		0
Level 3 [Member] | REIT Fund [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		0		0
Level 3 [Member] | Money Market Funds [Member]
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]
Fair value of assets		$ 0		$ 0

[1] As of June 30, 2017, $1.2 million and $6.8 million are included in “Prepaid expenses and other current assets” (liability offset in “Other accrued expenses and other current liabilities”) and “Other non-current assets” (liability offset in “Deferred compensation”), respectively, in the consolidated balance sheets reflecting the non-qualified Deferred Compensation Plan assets.

[2] As of December 31, 2016, $0.9 million and $7.5 million are included in “Prepaid expenses and other current assets” (liability offset in “Other accrued expenses and other current liabilities”) and “Other non-current assets” (liability offset in “Deferred compensation”), respectively, in the consolidated balance sheets reflecting the non-qualified Deferred Compensation Plan assets.